CN211891604U

CN211891604U - Cotton easy demoulding laminating machine of pearl

Info

Publication number: CN211891604U
Application number: CN202020123205.XU
Authority: CN
Inventors: 刘红焰
Original assignee: Zhejiang Huicai Packaging Co ltd
Current assignee: Zhejiang Huicai Packaging Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-11-10
Anticipated expiration: 2030-01-19

Abstract

The utility model provides a cotton laminating machine that easily takes off mould of pearl belongs to packaging material technical field. The pearl wool easy-demoulding laminating machine comprises a laminating mechanism, a first demoulding mechanism and a second demoulding mechanism. The upper die base is connected with the output end of the first cylinder, the lower die base is fixedly arranged on the upper surface of the fixing plate, the lower die base is right below the upper die base, and a die groove is formed in the lower die base. First trachea with the second trachea run through in the fixed plate, first trachea with the second trachea run through in the connecting plate, first trachea with the second trachea extends to respectively the inside of die cavity, the one end of second cylinder is connected the upper surface of connecting plate, the output of second cylinder with the fixed plate intercommunication, the ejector pin with the output of second cylinder is connected, has improved the cotton adhesion of pearl and has not been convenient for the problem of drawing of patterns on rigging machine.

Description

Cotton easy demoulding laminating machine of pearl

Technical Field

The utility model relates to a packaging material field particularly, relates to a cotton laminating machine that easily takes off mould of pearl.

Background

At present, the thickness of the pearl cotton is generally between 2mm and 20mm, and in practical application, the thickness of the pearl cotton needs to reach about 50mm, so the pearl cotton needs to be attached into a whole to increase the thickness of the pearl cotton.

In actual production, the in-process of pearl cotton in the interior laminating of lower mould, the cotton adhesion of pearl often can appear on the rigging machine, the drawing of patterns of being not convenient for leads to influencing the production efficiency of the cotton laminating of pearl.

SUMMERY OF THE UTILITY MODEL

In order to remedy the defects, the utility model provides a cotton laminating machine of easily demoulding of pearl, which aims to improve the problem that the cotton adhesion of pearl is not convenient for demoulding on the laminating machine.

The utility model discloses a realize like this:

the utility model provides a cotton laminating machine that easily takes off mould of pearl, including laminating mechanism, first demoulding mechanism and second demoulding mechanism.

Laminating mechanism includes first frame, first cylinder, fixed plate, connecting plate, upper die base and die holder, first cylinder is fixed to be set up the top of first frame, the both ends of fixed plate with first frame is connected, the connecting plate sets up the below of fixed plate, the both ends of connecting plate with first frame is connected, the upper die base with the output of first cylinder is connected, the die holder is fixed to be set up the upper surface of fixed plate, the die holder just to the below of upper die base, the die cavity has been seted up in the die holder.

The first demolding mechanism comprises an air compressor, a main air pipe, a first air pipe and a second air pipe, the main air pipe is connected with an air outlet of the air compressor, the main air pipe is arranged below the connecting plate, the first air pipe and the second air pipe are communicated with the main air pipe respectively, the first air pipe and the second air pipe penetrate through the fixing plate, the first air pipe and the second air pipe penetrate through the connecting plate, and the first air pipe and the second air pipe extend to the inside of the mold groove respectively.

The second demoulding mechanism comprises a second cylinder, an ejector rod and a top plate, one end of the second cylinder is connected to the upper surface of the connecting plate, the output end of the second cylinder is communicated with the fixing plate, the ejector rod is connected with the output end of the second cylinder, the top plate is connected to the upper end of the ejector rod, and the top plate is arranged in the die cavity.

The utility model discloses an in one embodiment, first frame is including apron, landing leg and lower margin, the roof is fixed to be set up the upper end of landing leg, the lower margin sets up the bottom of landing leg.

The utility model discloses an in the embodiment, first through-hole has been seted up to the both sides of die holder upper surface, first trachea with the second trachea extends to respectively in the first through-hole.

The utility model discloses an in the embodiment, be close to in the die holder ejector pin department has seted up the second through-hole, the ejector pin sets up in the second through-hole.

The utility model discloses an in one embodiment, be provided with main trachea gate valve on the main trachea, first trachea with be provided with first trachea gate valve and second trachea gate valve on the second trachea respectively.

The utility model discloses an in one embodiment, the ejector pin includes the body of rod, elastic component and stopper, the elastic component winding is in the surface of the body of rod, the elastic component is located the stopper with between the roof, the stopper is connected the body of rod with between the output of second cylinder, the body of rod passes through the stopper with the output of second cylinder is connected, the body of rod the roof the elastic component and the stopper sets up respectively inside the die cavity of die holder.

The utility model discloses an in one embodiment, still include push mechanism, push mechanism includes third cylinder and ejector pad, the third cylinder is located the upper die base with between the die holder, the bottom of third cylinder is connected with the backup pad, backup pad fixed connection in the landing leg, the ejector pad with the output of third cylinder is connected, the ejector pad is located the upper die base with one side of die holder.

The utility model discloses an in an embodiment, still include conveying mechanism, conveying mechanism includes third cylinder, second frame, conveying motor, drive roll, driven voller and conveyer belt, the third cylinder is fixed set up in the landing leg, the second frame is close to one side of die holder is placed, conveying motor fixed connection in the second frame, the drive roll with the driven voller is connected respectively the both ends of second frame, the conveyer belt cup joints the drive roll with the surface of driven voller.

The utility model discloses an in the embodiment, conveying motor's output is connected with the transport chain, the other end of transport chain with the drive roll is connected, conveying motor with pass through between the drive roll transport chain connects.

The utility model discloses an in one embodiment, the fixed first gyro wheel that is provided with in bottom of air compressor machine, the bottom fixedly connected with second gyro wheel of second frame.

The utility model has the advantages that: the utility model discloses a cotton laminating machine that easily takes off mould of pearl that above-mentioned design obtained, during the use, the output through first cylinder drives the upper die base and carries out the up-and-down motion, the pressfitting messenger pearl cotton of die holder through the upper die base is laminated, after the upper die base left the die holder, the gas that the air compressor machine provided shunts first trachea and second trachea respectively through main trachea, the wind that first trachea and second trachea blown out upwards bloies along the both sides of die holder, the wind that blows off can help the pearl cotton to drop from the die holder, reduce the adhesion of pearl cotton to the die holder, then drive ejector pin and roof through the effect of second cylinder and carry out the up-and-down motion, upwards ejecting the pearl cotton, thereby the drawing of patterns is carried out to the pearl cotton in the die holder once more, the problem of the drawing of patterns of being not convenient for on the laminating machine of pearl cotton adhesion has been.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of an easy-to-release laminating machine for pearl wool provided by an embodiment of the present invention;

fig. 2 is a schematic structural view of a fitting mechanism, a first demolding mechanism and a pushing mechanism according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a second demolding mechanism according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a conveying mechanism according to an embodiment of the present invention.

In the figure: 100-a laminating mechanism; 110-a first rack; 112-a cover plate; 114-a leg; 116-ground anchor; 120-a first cylinder; 130-a fixed plate; 140-a connecting plate; 150-an upper die holder; 160-a lower die holder; 200-a first demolding mechanism; 210-an air compressor; 212-a first roller; 220-main air pipe; 222-main gas pipe gate valve; 240-a first air tube; 242-first tracheal gate valve; 250-a second trachea; 252-a second tracheal gate valve; 300-a second demolding mechanism; 310-a second cylinder; 320-a mandril; 321-a rod body; 322-an elastic member; 324-a stop block; 330-a top plate; 400-a pushing mechanism; 410-a third cylinder; 412-a support plate; 420-a push block; 500-a conveying mechanism; 520-a second rack; 522-a second roller; 530-conveying motor; 540-conveying chains; 550-drive roll; 560-driven rollers; 570-carousel.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1, the present invention provides a technical solution: an easy demoulding and pasting machine for pearl wool comprises a pasting mechanism 100, a first demoulding mechanism 200 and a second demoulding mechanism 300. The laminating mechanism 100 is used for laminating pearl cotton, and the first demolding mechanism 200 and the second demolding mechanism 300 are used for demolding the laminated pearl cotton.

Referring to fig. 1 and 2, the attaching mechanism 100 includes a first frame 110, a first cylinder 120, a fixing plate 130, a connecting plate 140, an upper mold 150, and a lower mold 160, the first frame 110 includes a cover plate 112, a leg 114, and a foot margin 116, the cover plate 112 is fixedly disposed at an upper end of the leg 114, the cover plate 112 is connected to the leg 114 by a screw, and the foot margin 116 is disposed at a bottom end of the leg 114. The first cylinder 120 is fixedly disposed above the first frame 110, the first cylinder 120 is screwed to the first frame 110, and both ends of the fixing plate 130 are connected to the first frame 110 by welding. The connection plate 140 is disposed below the fixing plate 130, two ends of the connection plate 140 are connected to the first frame 110, and the connection plate 140 is connected to the first frame 110 by welding. The upper die base 150 is connected with the output end of the first cylinder 120, and the upper die base 150 is connected with the first cylinder 120 through reinforcing ribs in a welding mode, so that the strength of welding is improved through the reinforcing ribs. The fixed upper surface that sets up at fixed plate 130 of lower bolster 160, through screw fixed connection between lower bolster 160 and the fixed plate 130, lower bolster 160 is just to the below of upper die base 150, adopts clearance fit between lower bolster 160 and the upper die base 150, has seted up the die cavity in the lower bolster 160.

Referring to fig. 1 and 2, the first demolding mechanism 200 includes an air compressor 210, a main air pipe 220, a first air pipe 240 and a second air pipe 250, a first roller 212 is fixedly disposed at the bottom of the air compressor 210, the main air pipe 220 is connected to an air outlet of the air compressor 210, the main air pipe 220 is disposed below the connecting plate 140, a main air pipe gate valve 222 is disposed on the main air pipe 220, the first air pipe 240 and the second air pipe 250 are respectively communicated with the main air pipe 220, and a first air pipe gate valve 242 and a second air pipe gate valve 252 are disposed on the first air pipe 240 and the second air pipe 250, respectively. The first air tube 240 and the second air tube 250 penetrate through the fixing plate 130, the first air tube 240 and the second air tube 250 penetrate through the connecting plate 140, the first air tube 240 and the second air tube 250 respectively extend into the die cavity, first through holes are formed in two sides of the upper surface of the lower die base 160, and the first air tube 240 and the second air tube 250 respectively extend into the first through holes.

In this embodiment, the air supplied from the air compressor 210 is divided into the first air pipe 240 and the second air pipe 250 through the main air pipe 220, and the first air pipe gate valve 242 and the second air pipe gate valve 252 can adjust the amount of the air in the first air pipe 240 and the second air pipe 250. The air blown out by the first air pipe 240 and the second air pipe 250 blows upwards along the two sides of the lower die holder 160, the blown air can help the pearl cotton to fall off from the lower die holder 160, the adhesion of the pearl cotton to the lower die holder 160 is reduced, and meanwhile the lower die holder 160 can also be cleaned, so that the pearl cotton residues are prevented from falling into the lower die holder 160.

Referring to fig. 1 and 3, the second demolding mechanism 300 includes a second cylinder 310, a rod 320, and a top plate 330, one end of the second cylinder 310 is connected to the upper surface of the connecting plate 140, the second cylinder 310 is connected to the connecting plate 140 by a screw, an output end of the second cylinder 310 is communicated with the fixing plate 130, the rod 320 is connected to an output end of the second cylinder 310, the rod 320 is connected to the second cylinder 310 by a screw, a second through hole is formed in the lower die base 160 near the rod 320, the rod 320 is disposed in the second through hole, the top plate 330 is connected to an upper end of the rod 320, the top plate 330 is connected to the rod 320 by welding, and the top plate 330 is disposed in the die slot. The ejector rod 320 and the top plate 330 are driven to move up and down under the action of the second air cylinder 310, so that the pearl cotton is ejected upwards, and the pearl cotton in the lower die holder 160 is demoulded.

The top bar 320 comprises a bar body 321, an elastic member 322 and a limit block 324, the elastic member 322 is wound on the outer surface of the bar body 321, the elastic member 322 is located between the limit block 324 and the top plate 330, the limit block 324 is connected between the bar body 321 and the output end of the second cylinder 310, the bar body 321 is connected with the output end of the second cylinder 310 through the limit block 324, and the bar body 321, the top plate 330, the elastic member 322 and the limit block 324 are respectively arranged inside the mold cavity of the lower mold base 160. Can play the effect of buffering through setting up elastic component 322, when upper die base 150 pushes down die holder 160, elastic component 322 can reduce the impact force of upper die base 150 to die holder 160, when upper die base 150 left die holder 160, receives extruded elastic component 322 and can cause a bounce-back to roof 330 to drive the cotton drawing of patterns that upwards carries on of pearl, the adhesion of reduction pearl cotton to die holder 160 that can be further.

Referring to fig. 1 and 2, the pearl wool easy-demoulding laminating machine further comprises a pushing mechanism 400, the pushing mechanism 400 comprises a third cylinder 410 and a pushing block 420, the third cylinder 410 is located between the upper die holder 150 and the lower die holder 160, a supporting plate 412 is connected to the bottom of the third cylinder 410, the third cylinder and the supporting plate are connected through screws, the supporting plate 412 is fixedly connected to the supporting legs 114, and the supporting plate 412 is connected with the supporting legs 114 through welding. The push block 420 is connected with the output end of the third cylinder 410, the push block 420 is in threaded connection with the output end of the third cylinder 410, and the push block 420 is located on one side of the upper die holder 150 and the lower die holder 160. The pearl cotton leaves from the lower die holder 160 by blowing the pearls through the first air pipe 240 and the second air pipe 250 and driving the top plate 330 to move up and down through the second air cylinder 310, and at the moment, the pearl cotton is pushed away from the space between the upper die holder 150 and the lower die holder 160 by driving the push block 420 to move left through the third air cylinder 410.

Referring to fig. 4, the machine for easily releasing and adhering pearl wool further comprises a conveying mechanism 500, wherein the conveying mechanism 500 comprises a second frame 520, a conveying motor 530, a driving roller 550, a driven roller 560 and a conveyor belt 570, the second frame 520 is disposed near one side of the lower die holder 160, and the bottom of the second frame 520 is fixedly connected with a second roller 522. The flexibility of the conveying mechanism 500 is increased by arranging the second roller 522, the conveying motor 530 is fixedly connected to the second rack 520, the conveying motor 530 and the second rack are fixedly connected through screws, the driving roller 550 and the driven roller 560 are respectively connected to two ends of the second rack 520, and the conveying belt 570 is sleeved on the outer surfaces of the driving roller 550 and the driven roller 560. The output end of the conveying motor 530 is connected with a conveying chain 540, the other end of the conveying chain 540 is connected with a driving roller 550, and the conveying motor 530 and the driving roller 550 are connected through the conveying chain 540. The transmission belt 570 transmits the pearl cotton pushed away by the push block 420 outwards, so that the pressed pearl cotton can be conveniently processed in the next step.

The operating principle of the easy demoulding laminating machine for pearl wool is as follows: when the pearl cotton demoulding device is used, the output end of the first air cylinder 120 drives the upper die holder 150 to move up and down, the pearl cotton is attached by pressing the upper die holder 150 on the lower die holder 160, the top plate 330 is rebounded by extrusion force received by the elastic piece 322 after the upper die holder 150 leaves the lower die holder 160, so that the pearl cotton is driven to demould upwards, air provided by the air compressor 210 is respectively shunted to the first air pipe 240 and the second air pipe 250 through the main air pipe 220, air blown out from the first air pipe 240 and the second air pipe 250 is blown upwards along two sides of the lower die holder 160, the blown air can help the pearl cotton to fall off from the lower die holder 160, adhesion of the pearl cotton to the lower die holder 160 is reduced, the ejector rod 320 and the top plate 330 are driven to move up and down by the action of the second air cylinder 310, the pearl cotton is ejected upwards, so that the pearl cotton in the lower die holder 160 is demoulded again, and the demoulded pearl cotton drives the pushing block 420 to move left through the The pearl cotton is pushed away and is conveyed to the conveying mechanism 500, and then the pearl cotton is conveyed outwards through the conveying belt 570, so that the pressed pearl cotton is conveniently treated in the next step, and the problem that the pearl cotton is adhered to a laminating machine and is not convenient for demolding is solved.

It should be noted that the specific model specifications of the first cylinder 120, the air compressor 210, the second cylinder 310, the third cylinder 410, and the conveying motor 530 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art in the field, so detailed description is omitted.

The power supply of the first cylinder 120, the air compressor 210, the second cylinder 310, the third cylinder 410, and the conveying motor 530 and the principle thereof will be apparent to those skilled in the art and will not be described in detail herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An easy demoulding and pasting machine for pearl wool, which is characterized by comprising

The laminating mechanism (100) comprises a first rack (110), a first air cylinder (120), a fixing plate (130), a connecting plate (140), an upper die holder (150) and a lower die holder (160), wherein the first air cylinder (120) is fixedly arranged above the first rack (110), two ends of the fixing plate (130) are connected with the first rack (110), the connecting plate (140) is arranged below the fixing plate (130), two ends of the connecting plate (140) are connected with the first rack (110), the upper die holder (150) is connected with an output end of the first air cylinder (120), the lower die holder (160) is fixedly arranged on the upper surface of the fixing plate (130), the lower die holder (160) is right opposite to the lower part of the upper die holder (150), and a die slot is formed in the lower die holder (160);

the first demolding mechanism (200) comprises an air compressor (210), a main air pipe (220), a first air pipe (240) and a second air pipe (250), wherein the main air pipe (220) is connected with an air outlet of the air compressor (210), the main air pipe (220) is arranged below the connecting plate (140), the first air pipe (240) and the second air pipe (250) are respectively communicated with the main air pipe (220), the first air pipe (240) and the second air pipe (250) penetrate through the fixing plate (130), the first air pipe (240) and the second air pipe (250) penetrate through the connecting plate (140), and the first air pipe (240) and the second air pipe (250) respectively extend to the inside of the mold groove;

second demoulding mechanism (300), second demoulding mechanism (300) includes second cylinder (310), ejector pin (320) and roof (330), the one end of second cylinder (310) is connected the upper surface of connecting plate (140), the output of second cylinder (310) with fixed plate (130) intercommunication, ejector pin (320) with the output of second cylinder (310) is connected, roof (330) are connected the upper end of ejector pin (320), roof (330) set up in the die cavity.

2. The machine for easily demoulding and pasting pearl wool according to claim 1, wherein the first frame (110) comprises a cover plate (112), a leg (114) and a foot margin (116), the cover plate (112) is fixedly arranged at the upper end of the leg (114), and the foot margin (116) is arranged at the bottom end of the leg (114).

3. The machine for easily demoulding and pasting pearl wool according to claim 1, wherein first through holes are formed on two sides of the upper surface of the lower die holder (160), and the first air pipe (240) and the second air pipe (250) respectively extend into the first through holes.

4. The machine for easily demoulding and pasting pearl wool according to claim 1, wherein a second through hole is formed in the lower die holder (160) near the ejector rod (320), and the ejector rod (320) is arranged in the second through hole.

5. The machine for easily demoulding and pasting pearl wool according to claim 1, wherein a main air pipe gate valve (222) is arranged on the main air pipe (220), and a first air pipe gate valve (242) and a second air pipe gate valve (252) are respectively arranged on the first air pipe (240) and the second air pipe (250).

6. The machine according to claim 1, wherein the ejector rod (320) comprises a rod body (321), an elastic member (322) and a stopper (324), the elastic member (322) is wound on the outer surface of the rod body (321), the elastic member (322) is located between the stopper (324) and the top plate (330), the stopper (324) is connected between the rod body (321) and the output end of the second cylinder (310), the rod body (321) is connected with the output end of the second cylinder (310) through the stopper (324), and the rod body (321), the top plate (330), the elastic member (322) and the stopper (324) are respectively disposed inside the mold groove of the lower mold base (160).

7. The machine for easily demoulding and pasting pearl wool according to claim 2, further comprising a pushing mechanism (400), wherein the pushing mechanism (400) comprises a third cylinder (410) and a pushing block (420), the third cylinder (410) is located between the upper die holder (150) and the lower die holder (160), a supporting plate (412) is connected to the bottom of the third cylinder (410), the supporting plate (412) is fixedly connected to the supporting legs (114), the pushing block (420) is connected to the output end of the third cylinder (410), and the pushing block (420) is located on one side of the upper die holder (150) and one side of the lower die holder (160).

8. The machine according to claim 1, further comprising a conveying mechanism (500), wherein the conveying mechanism (500) comprises a second frame (520), a conveying motor (530), a driving roller (550), a driven roller (560) and a conveyor belt (570), the second frame (520) is disposed near one side of the lower die holder (160), the conveying motor (530) is fixedly connected to the second frame (520), the driving roller (550) and the driven roller (560) are respectively connected to two ends of the second frame (520), and the conveyor belt (570) is sleeved on outer surfaces of the driving roller (550) and the driven roller (560).

9. The machine for easily demoulding and pasting pearl wool according to claim 8, wherein the output end of the conveying motor (530) is connected with a conveying chain (540), the other end of the conveying chain (540) is connected with the driving roller (550), and the conveying motor (530) is connected with the driving roller (550) through the conveying chain (540).

10. The machine for easily demoulding and pasting pearl wool according to claim 8, wherein a first roller (212) is fixedly arranged at the bottom of the air compressor (210), and a second roller (522) is fixedly connected to the bottom of the second frame (520).